eolas/Programming_Languages/Shell/Functions_in_Bash.md

categories	tags
Programming Languages	shell

Functions in Bash

• We don't name function parameters in the function declaration. Instead we have an implied index of arguments: $1, $2, $3,.... When the function is called, the first value after the function name becomes $1 by default.

function expandRange() {
    declare -a expandedRange=()
    for (( i=$1; i<=$2; i++ )); do
        expandedRange+=($i)
    done
    echo "${expandedRange[@]}"
}

expandedRange=$(expandRange 1 4)
echo $expandedRange
# 1 2 3 4